Beam for a co-ordinate measuring machine, method for its production, and measuring machine provided with said beam

Abstract

A beam for a measuring machine is constituted by a plurality of extruded beam elements, which are set alongside one another and welded together so that each forms a portion of the cross section of the beam itself; the beam elements and the beam have a hollow section shaped like an equilateral triangle.

1. A beam of a measuring machine, the beam comprising a plurality of beam elements having the same cross section and each forming, in cross section, a part of the cross section of said beam, said beam elements being set alongside one another and welded together so as to form as a whole said beam, wherein each face of said beam is defined by respective faces of two different beam elements set alongside, and coplanar with, one another, and wherein said beam elements delimit a central cavity of said beam, characterized in that said beam has a cross section substantially shaped like an equilateral triangle. 
     
     
       2. The beam according to  claim 1 , characterized in that each of said beam elements has three main faces, intercalated with chamfers of width much smaller than the main faces and forming, each, respective edges with the main faces adjacent thereto. 
     
     
       3. The beam according to  claim 2 , characterized in that said beam elements are set alongside one another so that the edges adjacent to one of the faces of each beam element facing the inside of the beam mate with respective edges of the other two beam elements. 
     
     
       4. The beam according to  claim 3  wherein the chamfers of the respective beam elements defining each face of the beam form a median recess of said face with triangular cross section, said beam elements being joined to one another by means of continuous welds along said recesses, which receive the weld material of the welds. 
     
     
       5. A beam of a measuring machine, the beam comprising a plurality of beam elements having the same cross section and each forming, in cross section, a part of the cross section of said beam, said beam elements being set alongside one another and welded together so as to form as a whole said beam, wherein said beam has a cross section substantially shaped as an equilateral triangle and each face of said beam is defined by respective faces of two different beam elements set alongside, and coplanar with, one another, said beam elements being welded to one another at edges thereof.